Improvement in sash-pulleys



W. I-Ik BICKNELL.

SASII-PULLEY.

'Patented Now-.9,1875.

UNITED STATES ATENT OFFICE.,

WILLIAM H. BIOKNELL, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN SASH-PULLEVS.

Specication forming part of Letters Patent No. 69,766, dated November 9, 1875; application tiled September 2S, 1875.

To all whom it may concer Be it known that l, WILLIAM H. BIGKNELI., ot'Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Sash-Pulley, of which the following is a specication:

This invention relates to improvements in sash-supporting pulleys, whereby the usual wimlow-weights may be dispensed with; and the invention consists in a sash-pulley provided with two pulleys or guides to control the vertical position of the sash-cord, with a third pulley or anti-friction surface to receive and hold the bight-ot' the doubled sash-cord, and an opening for the sash-separating bead, all substantially as specified.

Figure lis a view of one ot' my sash-supporting pulleys in place in a windowframe, and shown as connected by cords with sash, each sash acting as a counter-balance for the other. Fig. 2 is a. rear side view ot' one of these improved pulleys; and Fig. 3' is a side view thereof.

In the drawing, a is the frame ot' the sashpulley, having openings b b for the passage of the doubled sash-cord c, an opening, d, for the usual bead separating thetwo sash e e, such head, however, not being shown. At the back of the front plate ot' the pulley are ears or lugs/if, and g, to support pulleys h i, two pulleys, i, being shown. The pulleys h i are shown as grooved to better retain the rope c, and their peripheries are placed in, or substantially in, the slots b, the pulleys turning on journals in lugsf. The pulley 'i is placed above, and preferably centrally between, pulleys 7L, and at an inclination to the face ofthe pulley-frame, and the pulley t' is preferably of such size that it will deliver its rope or cord into the grooves ot' pulleys h without binding on the Hanges, whereby the cord would be cut or unnecessarily Worn or chated. The outside circular portion j ofthe frame is provided with a screw-thread, and the frame is circular, so that the pulley may be screwed into a hole bored or cut in a window-casing; or, it' desired, ears or lugs 7c may project from the side ot' the frame, as shown iu dotted lines at the right of Fig. 1, whereby, by means of screws, the pulley-frame may be held in position.

It is evident the frame might be of other than circula-r` shape, but circular is preferred.

Instead of the pulley i, as shown, Imay employ an anti-friction cylinder or roller, extending from the lug g to the edge of the frame a, as shown in dotted lines, Fig. 2, and instead of pulleys h I might use short anti-friction roller sleeves or wheels, and, in some instances, with light sash, I might dispense altogether with rollers h, and allow the vertical portions of the rope to pass over stationary' guides at the i'ront ot' the frame.

I do not desire to limit my invention to the use ot the particular wheels shown.

The frame a and lugs will preferal'ily be cast in one piece, and the screw-thread at the edge be formed by castin.

In some cases one sash is very much heavier than another connected by the same cord, and in such cases I propose to use a friction device to moet and hold one sash at any desired place.

Sash connected by a single cord may' be counterlralanced evenly, so as to move freely and lightly without the use ot' weights, as usual. d

The pulley z might be supported at or below the lower edges of the pulleys l1., and -be placed on a horizontal stud, the wheel turning in a vertical rather than in a horizontal plane.

I claiml. A sash-pulley frame, provided with openings for the passage otasingle rope or cord, and with an intermediate opening or groove for the reception ofthe saslrseparating bead, in combination with the two pulleys or guides to control the vertical portions ofthe sash-cord, and with a pulley to sustain the bight ot' the sash-cord, substantially as described..

2. A sash-pulley frame, provided with openings for the passage of a single rope or cord, and with an intermediate opening for the reception of the sash-separating bead;

3. A sash-pulley, provided with three pulleys, arranged as shown, a screw-thread, and ears for bearings for the pulleys, all substantially as described.

In testimony whereofI I have signed my name to this specification lin the presence ot' two subscribing witnesses.

WILLIAM H. BIGKNELL..

Witnesses:

G. W. GREGORY, S. B. KIDDER. 

